config: validate dashboard-address (#2517)

[sre-bot]

cherry-pick #2517 to release-4.0

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Signed-off-by: Zheng Xiangsheng hundundm@gmail.com

What problem does this PR solve?

• fix Setting dashboard-address in the wrong format can cause unexpected behavior #2503

What is changed and how it works?

• When setting the pd-server config, validate the dashboard-address and reject the incorrect setting.

Check List

Tests

• Unit test

Release note

[codecov-commenter]

Codecov Report

Merging #2522 into release-4.0 will increase coverage by 0.58%.
The diff coverage is 67.50%.

@@               Coverage Diff               @@
##           release-4.0    #2522      +/-   ##
===============================================
+ Coverage        77.07%   77.66%   +0.58%     
===============================================
  Files              204      204              
  Lines            21905    21940      +35     
===============================================
+ Hits             16883    17039     +156     
+ Misses            3731     3616     -115     
+ Partials          1291     1285       -6     

Impacted Files	Coverage Δ
pkg/dashboard/adapter/manager.go	86.79% <ø> (+2.38%)	⬆️
server/server.go	77.25% <28.57%> (-0.29%)	⬇️
server/cluster/cluster.go	83.64% <66.66%> (+3.35%)	⬆️
pkg/dashboard/adapter/redirector.go	94.23% <100.00%> (ø)
server/config/config.go	78.92% <100.00%> (+0.92%)	⬆️
server/config/util.go	89.47% <100.00%> (+6.14%)	⬆️
server/schedulers/random_merge.go	61.19% <0.00%> (-2.99%)	⬇️
client/base_client.go	88.59% <0.00%> (-2.02%)	⬇️
server/tso/tso.go	81.02% <0.00%> (ø)
server/grpc_service.go	60.92% <0.00%> (+0.38%)	⬆️
... and 14 more

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[HunDunDM]

/run-all-tests

[disksing]

/merge

[sre-bot]

Sorry @disksing, you don't have permission to trigger auto merge event on this branch.
The version releasement is in progress.

[disksing]

/merge

[sre-bot]

Sorry @disksing, you don't have permission to trigger auto merge event on this branch.
The version releasement is in progress.

[disksing]

/merge

[sre-bot]

Sorry @disksing, you don't have permission to trigger auto merge event on this branch.
The version releasement is in progress.

[disksing]

sorry @sre-bot

[nolouch]

/merge

[sre-bot]

Sorry @nolouch, you don't have permission to trigger auto merge event on this branch.
The version releasement is in progress.

[nolouch]

/merge

[sre-bot]

/run-all-tests