Prepare release 1.13.0

[0xnm]

What does this PR do?

This PR prepares release 1.13.0. It includes commit to skip NDK symbol files upload task creation, because this functionality is not yet completely ready on the backend side, so shouldn't be a part of the release.

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• Make sure you discussed the feature or bugfix with the maintaining team in an Issue
• Make sure each commit and the PR mention the Issue number (cf the CONTRIBUTING doc)

[codecov-commenter]

Codecov Report

Merging #232 (04a4818) into release/1.13.0 (28694ed) will decrease coverage by 4.81%.
The diff coverage is n/a.

Additional details and impacted files

@@                 Coverage Diff                  @@
##             release/1.13.0     #232      +/-   ##
====================================================
- Coverage             81.34%   76.52%   -4.81%     
+ Complexity              203      200       -3     
====================================================
  Files                    26       26              
  Lines                   793      788       -5     
  Branches                104      104              
====================================================
- Hits                    645      603      -42     
- Misses                  112      147      +35     
- Partials                 36       38       +2     

Files	Coverage Δ
...com/datadog/gradle/plugin/DdAndroidGradlePlugin.kt	60.87% <ø> (-7.81%)	⬇️

... and 3 files with indirect coverage changes