Various fuzz test runner improvements
Various fuzz test runner improvements

Summary:
Backport of core [[https://github.com/bitcoin/bitcoin/pull/18166 | PR18166]].

The title has been changed because the CI changes are not ported.

Test Plan:
  ninja bitcoin-fuzzers
  ./test/fuzz/test_runner.py <path_to_corpus>

Reviewers: #bitcoin_abc, PiRK

Reviewed By: PiRK

Differential Revision: https://reviews.bitcoinabc.org/D8276

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