fix: remove wal_level default values and validation

[shemau]

Description

Following on from #508 and #512, remove the wal_level is being hidden.

Consumers can still set a value, since the field is still present and optional.
The default values no longer set wal_level and the validation is removed.

This PR will need revert / updating when the service changes are deployed

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[shemau]

/run pipeline

[ocofaigh]

@shemau I think upgrade test will fail (since main branch DA code is broken)

[ocofaigh]

suggest to link to #512

[shemau]

Upgrade fails

TestRunStandardUpgradeSolution 2024-11-06T15:10:35Z logger.go:66: │     "Result": {
TestRunStandardUpgradeSolution 2024-11-06T15:10:35Z logger.go:66: │         "errors": {
TestRunStandardUpgradeSolution 2024-11-06T15:10:35Z logger.go:66: │             "configuration.wal_level": [
TestRunStandardUpgradeSolution 2024-11-06T15:10:35Z logger.go:66: │                 "must be one of: hot_standby, logical"
TestRunStandardUpgradeSolution 2024-11-06T15:10:35Z logger.go:66: │             ]
TestRunStandardUpgradeSolution 2024-11-06T15:10:35Z logger.go:66: │         }
TestRunStandardUpgradeSolution 2024-11-06T15:10:35Z logger.go:66: │     },

Because the base branch is broken. No other errors, so skipping upgrade.

[shemau]

/run pipeline

[ocofaigh]

Timeout (reported to ICD). Retrying to see if it was a once off..

[ocofaigh]

/run pipeline

[shemau]

The test that failed this run passed the first time...

TestRunBasicExampleWithFlavor 2024-11-06T15:14:04Z logger.go:66: module.read_only_replica_postgresql_db[0].ibm_database.postgresql_db: Creation complete after 7m52s [id=crn:v1:bluemix:public:databases-for-postgresql:eu-de:a/abac0df06b644a9cabc6e44f55b3880e:f267af9b-bded-4543-aa27-9b6ddad6bde7::]

So I am just going to try again. (Oh my page just updated... it was already restarted... so I will follow that)

[terraform-ibm-modules-ops]

🎉 This PR is included in version 3.17.11 🎉

The release is available on:

• GitHub release
• v3.17.11

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