carto/grpc @ 39b40cbccbe8145dba88583bbdac0ff88a111198

Mark D. Roth d23af02826 Merge pull request #18581 from markdroth/fix_test_noisiness		%!s(int64=7) %!d(string=hai) anos
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build	d7c6c6e40f !@#!%$@#	%!s(int64=7) %!d(string=hai) anos
core	ba00d3c914 Added a locality map class that maintains a child policy per locality. This is used by the xds lb policy to manage multiple localities. Also added a grpc_core::Map which is a templatized map, that is used by the locality map to maintain this info	%!s(int64=7) %!d(string=hai) anos
cpp	ce2af3b958 Remove noisy log message.	%!s(int64=7) %!d(string=hai) anos
distrib	c1001e7909 Merge pull request #18467 from jtattermusch/csharp_tools_distribtest2	%!s(int64=7) %!d(string=hai) anos
http2_test	7897ae9308 auto-fix most of licenses	%!s(int64=8) %!d(string=hai) anos
.clang-tidy	f8a4aae119 Fix all instances of bugprone-undefined-memory-manipulation	%!s(int64=7) %!d(string=hai) anos