RFR: 1824: /reviewers N should remove ready status for clean backports [v2]

[Zhao Song]

> Currently, If a user issues /reviewers command in a clean backport, the reviewers requirement will not be displayed in the pr body and it won't be an integration blocker.
> 
> In this patch, after user issued /reviewers command, the reviewrs check for clean backport will be enabled. And if the Reviewers check requirements in the jcheck conf are stricter than the user's requirements, the bot will enforce the stricter requirements

Zhao Song has updated the pull request incrementally with one additional commit since the last revision:

  Update bots/pr/src/main/java/org/openjdk/skara/bots/pr/ReviewersCommand.java
  
  Co-authored-by: Erik Joelsson <37597443+erikj79 at users.noreply.github.com>

-------------

Changes:
  - all: https://git.openjdk.org/skara/pull/1482/files
  - new: https://git.openjdk.org/skara/pull/1482/files/41b6e94a..aac73813

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=skara&pr=1482&range=01
 - incr: https://webrevs.openjdk.org/?repo=skara&pr=1482&range=00-01

  Stats: 2 lines in 1 file changed: 0 ins; 1 del; 1 mod
  Patch: https://git.openjdk.org/skara/pull/1482.diff
  Fetch: git fetch https://git.openjdk.org/skara pull/1482/head:pull/1482

PR: https://git.openjdk.org/skara/pull/1482