ci: use fail-fast: false for more jobs

[jsoref]

Short description

CI appears to be flaky because of random networking problems. It seems more useful to let the other jobs run and potentially pass than to just kill them when something flaky flakes.

Checklist

I have:

• read the CONTRIBUTING.md document
• compiled this code
• tested this code
• included documentation (including possible behaviour changes)
• documented the code
• added or modified regression test(s)
• added or modified unit test(s)

[coveralls]

Pull Request Test Coverage Report for Build 13441220383

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 57 unchanged lines in 10 files lost coverage.
• Overall coverage increased (+3.8%) to 64.501%

---

Files with Coverage Reduction	New Missed Lines	%
ext/json11/json11.cpp	2	62.72%
pdns/misc.cc	2	62.46%
pdns/recursordist/rec-tcpout.cc	3	61.9%
pdns/recursordist/syncres.cc	3	80.3%
pdns/recursordist/test-syncres_cc2.cc	3	88.85%
pdns/signingpipe.cc	5	83.11%
pdns/dnsdistdist/dnsdist-carbon.cc	6	61.7%
pdns/recursordist/test-syncres_cc1.cc	6	89.57%
pdns/dnsdistdist/dnsdist-tcp.cc	8	75.82%
pdns/recursordist/rec-system-resolve.cc	19	45.92%

Totals
Change from base Build 13433765276:	3.8%
Covered Lines:	127617
Relevant Lines:	166903

---

💛 - Coveralls

[romeroalx]

LGTM!