CcGenerateDwp should take into account that some dwo files are not referenced by the binary file

[anhlinh123]

Description of the feature request:

CcGenerateDwp takes all .dwo files as inputs and executed the dwp tool to collect all of them into the final dwp file.
Meanwhile, not all of the .o files are linked in the final binary.
That means the dwp file contains a lot of unused information and becomes unnecessarily big.

CcGenerateDwp should take that into account and remove unneeded .dwo files in the output dwp file.

Which category does this issue belong to?

No response

What underlying problem are you trying to solve with this feature?

Dwp files are too big, and contain so much unneeded info.

Which operating system are you running Bazel on?

Ubuntu

What is the output of bazel info release?

release 6.1.1

If bazel info release returns development version or (@non-git), tell us how you built Bazel.

No response

What's the output of git remote get-url origin; git rev-parse master; git rev-parse HEAD ?

No response

Have you found anything relevant by searching the web?

No response

Any other information, logs, or outputs that you want to share?

No response

[github-actions]

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