(fips): Ensure that TLS options are FIPS compliant

[simitt]

Ensure that APM Server default TLS options are FIPS compliant for apm agents/otel sdks communicating to APM Server (server mode) and APM Server communicating with supported output (client mode).

[simitt]

related change in elastic/elastic-agent-libs#278

[kruskall]

This depends on some fixes in the upstream lib:

• fix: validate tls version in config elastic-agent-libs#287
• feat(fips): bump supported min tls version to 1.2 elastic-agent-libs#286
• feat(fips): do not set insecure defaults in fips mode elastic-agent-libs#273
• feat(fips): restrict supported ciphers in fips mode elastic-agent-libs#288
• feat(fips): restrict supported tls curve types in fips mode elastic-agent-libs#294

[kruskall]

PRs merged. Closing this.