cluster: ignore no tispark master error when listing clusters

[AstroProfundis]

What problem does this PR solve?

Fix #909

What is changed and how it works?

Ignore no tispark master error when listing clusters

Check List

Tests

• Manual test (add detailed scripts or steps below)

Code changes

• Has exported function/method change

Related changes

• Need to cherry-pick to the release branch

Release notes:

cluster: ignore no tispark master error when listing installed clusters

[codecov-io]

Codecov Report

Merging #920 (fdda574) into master (bd9a03a) will increase coverage by 0.05%.
The diff coverage is 62.50%.

@@            Coverage Diff             @@
##           master     #920      +/-   ##
==========================================
+ Coverage   53.09%   53.14%   +0.05%     
==========================================
  Files         260      260              
  Lines       18941    18946       +5     
==========================================
+ Hits        10056    10069      +13     
+ Misses       7340     7336       -4     
+ Partials     1545     1541       -4     

Flag	Coverage Δ
cluster	45.19% <62.50%> (+0.08%)	⬆️
dm	25.03% <62.50%> (-0.05%)	⬇️
integrate	47.74% <62.50%> (+0.05%)	⬆️
playground	22.09% <ø> (ø)
tiup	10.67% <ø> (ø)
unittest	21.51% <0.00%> (-0.01%)	⬇️

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

Impacted Files	Coverage Δ
pkg/cluster/manager.go	67.63% <62.50%> (+0.26%)	⬆️
pkg/cluster/api/dmapi.go	58.26% <0.00%> (-1.74%)	⬇️
pkg/cluster/api/pdapi.go	61.30% <0.00%> (+1.23%)	⬆️
pkg/cluster/api/binlog.go	38.93% <0.00%> (+1.76%)	⬆️
pkg/utils/http_client.go	72.22% <0.00%> (+5.55%)	⬆️

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[lucklove]

LGTM