cluster: skip dir conflict if node marked ignore_exporter

[AstroProfundis]

What problem does this PR solve?

If both clusters have the same monitor deploy dir set in their topology files, scaling out one with ignore_exporter: true to a shared host still reporting an directory conflict error.

What is changed and how it works?

Ignore dir conflict error if both sides are monitor directories and one of them is marked as ignore_exporter.

This is a following up of #1492

Check List

Tests

• Unit test

Related changes

• Need to cherry-pick to the release branch

Release notes:

NONE

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• nexustar

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[codecov-commenter]

Codecov Report

Merging #1649 (1840f0f) into master (5e97222) will increase coverage by 34.81%.
The diff coverage is 0.00%.

@@             Coverage Diff             @@
##           master    #1649       +/-   ##
===========================================
+ Coverage   15.58%   50.39%   +34.81%     
===========================================
  Files         151      294      +143     
  Lines       15250    26985    +11735     
===========================================
+ Hits         2376    13598    +11222     
+ Misses      12357    11316     -1041     
- Partials      517     2071     +1554     

Flag	Coverage Δ
cluster	43.79% <0.00%> (?)
dm	25.91% <0.00%> (?)
integrate	50.39% <0.00%> (+34.81%)	⬆️
playground	13.33% <0.00%> (?)
tiup	15.57% <0.00%> (-0.01%)	⬇️
unittest	∅ <ø> (∅)

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

Impacted Files	Coverage Δ
pkg/cluster/spec/validate.go	62.79% <0.00%> (+62.79%)	⬆️
components/dm/command/exec.go	87.50% <0.00%> (ø)
pkg/cluster/task/builder.go	98.73% <0.00%> (ø)
pkg/cluster/operation/scale_in.go	57.67% <0.00%> (ø)
pkg/cluster/task/env_init.go	58.97% <0.00%> (ø)
pkg/cluster/manager/upgrade.go	56.11% <0.00%> (ø)
components/playground/instance/process.go	84.90% <0.00%> (ø)
components/cluster/command/check.go	86.66% <0.00%> (ø)
pkg/cluster/ansible/inventory.go	0.00% <0.00%> (ø)
components/dm/command/reload.go	76.92% <0.00%> (ø)
... and 237 more

---

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[AstroProfundis]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 1840f0f