feat(versions): record own build info/version as properties, validate server version

[andrewazores]

Fixes #504
Fixes #505

At build time, the following bits of information are recorded into resources files which are included in the distribution JAR:

• pom.xml version, ie the Agent's own version string
• pom.xml cryostat.server.version.min and cryostat.server.version.max, the minimum (inclusive) and maximum (exclusive) Cryostat server versions that this Agent version is expected to work with. Currently set to 4.0.0 and 5.0.0 respectively, forming the range [4.0.0, 5.0.0), so that any Cryostat server version 4.y.z should be within range. These are set as pom.xml properties rather than in the microprofile-config.properties so that they are build-time immutable.
• current git commit hash

The Agent reads its own version string and logs this at startup. It loads all of these values and sets them as various system properties so that they can be retrieved generically later on. Finally, when it attempts to register itself with the Cryostat server, it performs a GET /health check against the server to obtain the server's cryostatVersion string, then parses that to a semantic version, and compares that to the expected server version range. If the actual server version is outside of the expected range then the agent logs a warning.

2024-10-04 18:07:44:382 +0000 [cryostat-agent-main] INFO io.cryostat.agent.Agent - Cryostat Agent version 0.5.0-SNAPSHOT starting...
...
2024-10-04 18:08:25:018 +0000 [cryostat-agent-worker-2] DEBUG io.cryostat.agent.Registration - Connected to Cryostat server: version 4.0.0 , build abfc597f1a7ad93093f7ead616766d56b4333809

[Josh-Matsuoka]

I think the fixme in BuildInfo is probably worthwhile, we should open an issue for core to keep track of it. Other than that LGTM

[ebaron]

I'm getting an error upon agent startup after this change:

Exception in thread "cryostat-agent-main" Exception in thread "cryostat-agent-main" java.lang.NumberFormatException: For input string: "0-SNAPSHOT"
	at java.base/java.lang.NumberFormatException.forInputString(NumberFormatException.java:67)
	at java.base/java.lang.Integer.parseInt(Integer.java:668)
	at java.base/java.lang.Integer.parseInt(Integer.java:786)
	at io.cryostat.agent.VersionInfo$Semver.fromString(VersionInfo.java:109)
	at io.cryostat.agent.VersionInfo.load(VersionInfo.java:50)
	at io.cryostat.agent.Agent.accept(Agent.java:210)
	at io.cryostat.agent.Agent.lambda$agentmain$0(Agent.java:160)
	at java.base/java.lang.Thread.run(Thread.java:840)
java.lang.NumberFormatException: For input string: "0-SNAPSHOT"
	at java.base/java.lang.NumberFormatException.forInputString(NumberFormatException.java:67)
	at java.base/java.lang.Integer.parseInt(Integer.java:668)
	at java.base/java.lang.Integer.parseInt(Integer.java:786)
	at io.cryostat.agent.VersionInfo$Semver.fromString(VersionInfo.java:109)
	at io.cryostat.agent.VersionInfo.load(VersionInfo.java:50)
	at io.cryostat.agent.Agent.accept(Agent.java:210)
	at io.cryostat.agent.Agent.lambda$agentmain$0(Agent.java:160)
	at java.base/java.lang.Thread.run(Thread.java:840)