PD-13323 Move the integration tests to unit tests, and speed up CI

[cryptalith]

Implements PD-13323.

[github-actions]

Unit test coverage

Module	Lines	Branches	Covered / total lines	Tests run	Lines (db stage)
orcid-activemq	n/a	n/a	0 / 0	—	n/a
orcid-api-common	42.0%	20.2%	1,736 / 4,133	95	—
orcid-api-web	58.0%	35.5%	1,241 / 2,139	1245	3.9%
orcid-core	—	—	no report	—	—
orcid-internal-api	61.5%	44.7%	160 / 260	16	—
orcid-message-listener	34.5%	29.1%	932 / 2,700	120	13.1%
orcid-persistence	2.1% ⚠️	2.9%	141 / 6,686	8	36.5%
orcid-pub-web	54.2%	57.5%	788 / 1,453	405	—
orcid-scheduler-web	28.7%	26.4%	788 / 2,744	51	—
orcid-utils	11.4% ⚠️	15.3%	428 / 3,757	38	—
orcid-web	47.9%	40.0%	4,666 / 9,743	534	8.1%
Reactor	32.4%	26.8%	10,880 / 33,615	2,512

_{JaCoCo line and branch coverage per module, from each module's own unit tests. No thresholds are enforced; ⚠️ marks under 25% line coverage for information only. The database stage is reported separately, not merged: a DAO covered only there would otherwise read as uncovered.}