update health checker

[leizhiyuan]

Motivation:

change SofaBootMiddlewareAfterReadinessCheckCallback to ReadinessCheckCallback

Modification:

Describe the idea and modifications you've done.

Result:

Fixes #.

If there is no issue then describe the changes introduced by this PR.

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (3.x@27c6cbd). Click here to learn what that means.
The diff coverage is 80%.

@@          Coverage Diff           @@
##             3.x     #104   +/-   ##
======================================
  Coverage       ?   54.87%           
  Complexity     ?      392           
======================================
  Files          ?       53           
  Lines          ?     1735           
  Branches       ?      309           
======================================
  Hits           ?      952           
  Misses         ?      603           
  Partials       ?      180

Impacted Files	Coverage Δ	Complexity Δ
...ay/sofa/rpc/boot/SofaBootRpcAutoConfiguration.java	95.23% <ø> (ø)	14 <0> (?)
...ay/sofa/rpc/boot/config/SofaBootRpcProperties.java	56.34% <ø> (ø)	87 <0> (?)
...a/rpc/boot/health/RpcAfterHealthCheckCallback.java	83.33% <80%> (ø)	2 <1> (?)

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