Add files related to clangd to .gitignore

Add files related to clangd to .gitignore.

For now I can't get clangd provided with the compiler we use to work with VS Code, but if I use the integrated one, it works just fine. For now no specific settings are applied, but I'll keep this draft for a bit.

/cc @akraszna @jcatmore @nstyles @jchapman

After the offline discussion we had with Attila, let's just get this in as it will ease the testing.

marked this merge request as ready

Jenkins please retry a build

This merge request affects no known packages. Consult an expert!

This merge request affects 1 file:

• .gitignore

Could not map the following files to a domain:

• .gitignore

added main no-domain review-pending-level-1 labels

CI Result SUCCESS (hash 91ef310b)

	Athena	AthSimulation	AthGeneration	AnalysisBase	AthAnalysis	DetCommon
externals
cmake
make
tests

Full details available on this CI monitor view. Check the JIRA CI status board for known problems
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
AnalysisBase: number of compilation errors 0, warnings 0
AthAnalysis: number of compilation errors 0, warnings 0
DetCommon: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-EL9 3626]

Changes look fine and the CI is good. Approving. Clara (L1)

added review-approved label and removed review-pending-level-1 label

resolved all threads

added 1 commit

• d7ea8e24 - Apply 1 suggestion(s) to 1 file(s)

Compare with previous version

This merge request affects no known packages. Consult an expert!

This merge request affects 1 file:

• .gitignore

Could not map the following files to a domain:

• .gitignore

added review-pending-level-1 label and removed review-approved label

CI Result SUCCESS (hash d7ea8e24)

	Athena	AthSimulation	AthGeneration	AnalysisBase	AthAnalysis	DetCommon
externals
cmake
make
tests

Full details available on this CI monitor view. Check the JIRA CI status board for known problems
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
AnalysisBase: number of compilation errors 0, warnings 0
AthAnalysis: number of compilation errors 0, warnings 0
DetCommon: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-EL9 3670]

Re-approving. Clara (L1)

added review-approved label and removed review-pending-level-1 label

merged

mentioned in commit 50bcb394