Avoid generating code for unsupported types in config source gen

[tarekgh]

#94117

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Issue Details

---

#94117

Author:	tarekgh
Assignees:	tarekgh
Labels:	area-Extensions-Configuration
Milestone:	-

[tarekgh]

CC @eerhardt

[tarekgh]

Note, this is a candidate change to port to the 8.0 servicing.

[tarekgh]

@ericstj @eiriktsarpalis I believe I addressed all feedback now.

[eiriktsarpalis]

LGTM, thanks.

[tarekgh]

/backport to release/8.0-staging

[github-actions]

Started backporting to release/8.0-staging: https://github.com/dotnet/runtime/actions/runs/6815764618

[github-actions]

@tarekgh backporting to release/8.0-staging failed, the patch most likely resulted in conflicts:

$ git am --3way --ignore-whitespace --keep-non-patch changes.patch

Applying: Avoid generating code for unsupported types in config source gen
.git/rebase-apply/patch:404: trailing whitespace.
        
.git/rebase-apply/patch:412: trailing whitespace.
        
.git/rebase-apply/patch:444: trailing whitespace.
        
.git/rebase-apply/patch:447: trailing whitespace.
        
.git/rebase-apply/patch:452: trailing whitespace.
        
warning: squelched 10 whitespace errors
warning: 15 lines add whitespace errors.
Using index info to reconstruct a base tree...
M	src/libraries/Microsoft.Extensions.Configuration.Binder/Microsoft.Extensions.Configuration.Binder.sln
M	src/libraries/Microsoft.Extensions.Configuration.Binder/gen/ConfigurationBindingGenerator.Parser.cs
M	src/libraries/Microsoft.Extensions.Configuration.Binder/gen/Parser/KnownTypeSymbols.cs
M	src/libraries/Microsoft.Extensions.Configuration.Binder/tests/SourceGenerationTests/GeneratorTests.Baselines.cs
M	src/libraries/Microsoft.Extensions.Configuration.Binder/tests/SourceGenerationTests/GeneratorTests.cs
Falling back to patching base and 3-way merge...
Auto-merging src/libraries/Microsoft.Extensions.Configuration.Binder/tests/SourceGenerationTests/GeneratorTests.cs
Auto-merging src/libraries/Microsoft.Extensions.Configuration.Binder/tests/SourceGenerationTests/GeneratorTests.Baselines.cs
Auto-merging src/libraries/Microsoft.Extensions.Configuration.Binder/gen/Parser/KnownTypeSymbols.cs
CONFLICT (content): Merge conflict in src/libraries/Microsoft.Extensions.Configuration.Binder/gen/Parser/KnownTypeSymbols.cs
Auto-merging src/libraries/Microsoft.Extensions.Configuration.Binder/gen/ConfigurationBindingGenerator.Parser.cs
Auto-merging src/libraries/Microsoft.Extensions.Configuration.Binder/Microsoft.Extensions.Configuration.Binder.sln
CONFLICT (content): Merge conflict in src/libraries/Microsoft.Extensions.Configuration.Binder/Microsoft.Extensions.Configuration.Binder.sln
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
Patch failed at 0001 Avoid generating code for unsupported types in config source gen
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".
Error: The process '/usr/bin/git' failed with exit code 128

Please backport manually!

[github-actions]

@tarekgh an error occurred while backporting to release/8.0-staging, please check the run log for details!

Error: git am failed, most likely due to a merge conflict.