RFR: 8358313: G1: Refactor G1CollectedHeap::is_maximal_no_gc [v2]

[Albert Mingkun Yang]

> Simple changing of a method name and return-type to be more consistent with the surrounding code.
> 
> Test: tier1

Albert Mingkun Yang has updated the pull request incrementally with one additional commit since the last revision:

  Update src/hotspot/share/gc/g1/g1CollectedHeap.cpp
  
  Co-authored-by: Joel Sikström <joel.sikstrom at oracle.com>

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Changes:
  - all: https://git.openjdk.org/jdk/pull/25579/files
  - new: https://git.openjdk.org/jdk/pull/25579/files/ed245efe..68367e1b

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=25579&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=25579&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/25579.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25579/head:pull/25579

PR: https://git.openjdk.org/jdk/pull/25579