Fix TidbMonitor several error (#1962)

[sre-bot]

cherry-pick #1962 to release-1.1

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What problem does this PR solve?

Fix #1949

What is changed and how does it work?

Fix following problem:

1. Add check to guaranteeing the nodePort won't be changed if the service Type of tidbmonitor is Nodeport
2. Add EnvVar sort to avoid the monitor controller render different result from the same tidbmonitor spec.
3. Add LB IP configuration rendering.
4. Change the reloader servicename to keep as same as the helm template.

Related changes

• Need to cherry-pick to the release branch

Does this PR introduce a user-facing change?:

1. Add check to guaranteeing the nodePort won't be changed if the serviceType of TidbMonitor is Nodeport
2. Add EnvVar sort to avoid the monitor controller render different result from the same TidbMonitor spec.
3. Fix the problem that Tidbmonitor LoadBalance IP is not used.