feat(Amazonq): Remove forced read-only view from before diff on agent code changes + Increase polling rate for Q agent code summary

[juusticeTG]

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• [ x ] New feature (non-breaking change which adds functionality)

Description

• Decrease requestDelay to 5000ms from 10000ms to provide user with more frequent agent code change updates
• Increased pollCount to 360 from 180 to accommodate for twice as frequent polling
• Removed forced read-only view on before diff of agent code changes. This is to enable users to edit on the left-side of the diff which represents the their workspace, allowing a more fluid code acceptance and manipulation experience.

Checklist

• [ x ] My code follows the code style of this project
• [ x ] I have added tests to cover my changes (Current tests are sufficient)
• [ x ] A short description of the change has been added to the CHANGELOG if the change is customer-facing in the IDE.
• I have added metrics for my changes (if required)

License

I confirm that my contribution is made under the terms of the Apache 2.0 license.

[tverney]

nit: can't we combine these both changelogs into one? Also, toolkit team requires to specify which team this change is going into.

"Amazon Q /dev: Remove read-only mode on proposed code changes and increase pooling rate for code generation status"

[rli]

unclear why changes in #5007 are in here

[manodnyab]

unclear why changes in #5007 are in here

Addressed internally