Bumping tool_coverage-linux  to 14G of memory to avoid OOM kil… (#50694)
Bumping tool_coverage-linux  to 14G of memory to avoid OOM kil… (#50694)

Bumping the memory limit for tool_coverage-linux to 14G because it keeps getting OOM-killed.

Submitting right away to fix the build.

TBR= @Hixie
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