Change typo 'waitting' to 'waiting' in output messages within pdapi.go.

[guangleibao]

What problem does this PR solve?

Correct typo in pdapi messages.

What is changed and how it works?

Change the string from 'waitting' to 'waiting'. There are 6 'waiiting' typos in pdapi.go:

pkg/cluster/api/pdapi.go:288:           pc.l().Debugf("Still waitting for the PD leader to be elected")
pkg/cluster/api/pdapi.go:289:           return perrs.New("still waitting for the PD leader to be elected")
pkg/cluster/api/pdapi.go:447:           pc.l().Debugf("Still waitting for the PD leader to transfer")
pkg/cluster/api/pdapi.go:448:           return perrs.New("still waitting for the PD leader to transfer")
pkg/cluster/api/pdapi.go:527:                   "\t  Still waitting for %d store leaders to transfer...",
pkg/cluster/api/pdapi.go:735:                           return perrs.New("still waitting for the PD node to be deleted")

[CLAassistant]

All committers have signed the CLA.

[codecov-commenter]

Codecov Report

Attention: 5 lines in your changes are missing coverage. Please review.

Comparison is base (ced2d6d) 47.65% compared to head (1eefbee) 52.47%.

❗ Current head 1eefbee differs from pull request most recent head fb1af3a. Consider uploading reports for the commit fb1af3a to get more accurate results

Files	Patch %	Lines
pkg/cluster/api/pdapi.go	16.67%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2330      +/-   ##
==========================================
+ Coverage   47.65%   52.47%   +4.81%     
==========================================
  Files         307      325      +18     
  Lines       33819    34764     +945     
==========================================
+ Hits        16116    18240    +2124     
+ Misses      15715    14319    -1396     
- Partials     1988     2205     +217     

Flag	Coverage Δ
cluster	39.19% <16.67%> (-2.76%)	⬇️
dm	25.55% <0.00%> (?)
playground	15.25% <0.00%> (?)
tiup	33.48% <ø> (ø)
unittest	22.29% <0.00%> (ø)

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

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[kaaaaaaang]

/lgtm

[kaaaaaaang]

/approve

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: kaaaaaaang

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [kaaaaaaang]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[breezewish]

@guangleibao Please sign the CLA agreement to get PR merged. Thanks a lot!

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-12-14 10:44:11.117280446 +0000 UTC m=+525742.154507370: ☑️ agreed by kaaaaaaang.
• 2023-12-18 08:56:02.042308669 +0000 UTC m=+864853.079535596: ✖️🔁 reset by ti-chi-bot[bot].
• 2023-12-19 06:10:55.182456332 +0000 UTC m=+941346.219683258: ☑️ agreed by breezewish.
• 2023-12-19 09:44:06.277219853 +0000 UTC m=+954137.314446782: ✖️🔁 reset by ti-chi-bot[bot].

[ti-chi-bot]

New changes are detected. LGTM label has been removed.

[guangleibao]

TiUP CLA agreement signed.

[breezewish]

Thanks for your contribution!