Move inactive maintainers to emeritus

[serathius]

I'm proposing to remove inactive maintainers based on new process established in #14238.

In addition I will be sending an email to maintainers mailing list that will cc removed maintainers, to ensure they are notified.

This PR requires approval of two other maintainers. To allow affected maintainers time to object I will leave 3 weeks of lazy consensus on this PR.

cc @ptabor @ahrtr @spzala @gyuho @mitake @jingyih @jpbetz @hexfusion @wenjiaswe @xiang90 @bdarnell @tbg

[ahrtr]

LGTM

Thanks @serathius for driving this.

Just to reiterate that the any EMERITUS maintainer can easily regain the maintainer role once starting to contribute to the project again.

[codecov-commenter]

Codecov Report

Merging #14373 (0785ef4) into main (192d635) will decrease coverage by 0.30%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main   #14373      +/-   ##
==========================================
- Coverage   71.02%   70.71%   -0.31%     
==========================================
  Files         455      455              
  Lines       37146    37146              
==========================================
- Hits        26384    26269     -115     
- Misses       9266     9365      +99     
- Partials     1496     1512      +16     

Flag	Coverage Δ
all	70.71% <ø> (-0.31%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
server/etcdserver/api/v3rpc/util.go	51.61% <0.00%> (-16.13%)	⬇️
server/proxy/grpcproxy/register.go	69.76% <0.00%> (-9.31%)	⬇️
server/storage/mvcc/watchable_store.go	84.42% <0.00%> (-9.06%)	⬇️
server/auth/simple_token.go	80.00% <0.00%> (-8.47%)	⬇️
client/pkg/v3/fileutil/purge.go	66.03% <0.00%> (-7.55%)	⬇️
client/v3/leasing/util.go	91.66% <0.00%> (-6.67%)	⬇️
client/v3/concurrency/session.go	88.63% <0.00%> (-4.55%)	⬇️
client/pkg/v3/testutil/leak.go	62.83% <0.00%> (-4.43%)	⬇️
server/etcdserver/api/v3rpc/interceptor.go	73.43% <0.00%> (-4.17%)	⬇️
server/etcdserver/txn/util.go	75.47% <0.00%> (-3.78%)	⬇️
... and 20 more

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[ptabor]

SGTM.

I'm just curious why not to keep the history of maintainenceship in the MAINTAINERS file,
such that e.g. option to be moved to MAINTAINERS is more obvious.

[serathius]

Over 2 weeks passed and most of the maintainers have acked the change in etcd-maintainers email group. With that I don't think there is a need to delay the change any more.