V2 Fix swag generating "oneOf" blocks for both form types

[mbd3v]

Describe the PR
Currently v2 branch has an issue with the generation of x-www-form-urlencoded and multipart/form-data schemas. For some reason, when generating the yaml and json for the swagger files, it is decided that if you have multiple //@Param comments then they all get bundled into a single oneOf statement which is not supposed to happen. For both forms they should look something like the following:

// @Accept          multipart/form-data
// @Produce         plain
// @Param           zip                   formData file    true  "Zip file containing checks.toml, users.toml, and/or settings.toml"
// @Param           destructiveChecks     formData boolean false "If true, destructively replace existing checks during checks.toml import"
// @Param           destructiveUsers      formData boolean false "If true, destructively replace existing users during users.toml import"
// @Param           destructiveSettings   formData boolean false "If true, destructively replace existing settings during settings.toml import"

Above comments correctly generates the below yaml:

requestBody:
        content:
          multipart/form-data:
            schema:
              properties:
                destructiveChecks:
                  description: If true, destructively replace existing checks during
                    checks.toml import
                  type: boolean
                destructiveSettings:
                  description: If true, destructively replace existing settings during
                    settings.toml import
                  type: boolean
                destructiveUsers:
                  description: If true, destructively replace existing users during
                    users.toml import
                  type: boolean
                zip:
                  description: Zip file containing checks.toml, users.toml, and/or
                    settings.toml
                  format: binary
                  type: string
              required:
              - zip
              type: object

// @Accept          application/x-www-form-urlencoded
// @Param           id          formData    int     true    "Check ID to update"
// @Param           name        formData    string  false   "Update check name"
// @Param           description formData    string  false   "Update check description"
// @Param           weight      formData    int     false   "Update check weight"
// @Param           activated   formData    boolean false   "Update check activation"
// @Param           allow_user_secrets  formData boolean false  "Are teams allowed to change the checks auth parameters?"
// @Param           type        formData    string  false   "Update check type"
// @Param           source      formData    string  false   "Update check source"
// @Param           metadata    formData    string  false   "Update check metadata"

Above x-www-form-urlencoded form correctly produces the following yaml:

      requestBody:
        content:
          application/x-www-form-urlencoded:
            schema:
              properties:
                activated:
                  description: Update check activation
                  type: boolean
                allow_user_secrets:
                  description: Are teams allowed to change the checks auth parameters?
                  type: boolean
                description:
                  description: Update check description
                  type: string
                id:
                  description: Check ID to update
                  type: integer
                metadata:
                  description: Update check metadata
                  type: string
                name:
                  description: Update check name
                  type: string
                source:
                  description: Update check source
                  type: string
                type:
                  description: Update check type
                  type: string
                weight:
                  description: Update check weight
                  type: integer
              required:
              - id
              type: object

Relation issue
Issue 242
Issue 2086

Both of the above issues are related to this. I didn't have time to test and see if this also fixed the json body issues that they were having but I know it at least works for the issues I have described.

PR 2131 also seems to fix the //@Accept issue so if that gets merged in first then I can remove it from this PR as well

Additional context
Go version: 1.25.8
Swag Version: 2.0.0 (Commit 8c7a6f6)

Please let me know if there is anything I should change to help get this merged in soon. Thanks for making this project!