*/*unit*: update NGINX Unit: 1.33.0 -> 1.34.0

Other changes:

• enable SSL support (corresponding knob is removed)
• enable PCRE2 support (PCRE, PCRE2, REGEX, NOPCRE knobs are removed)
• add QuickJS library as a dependency for the unitd+njs build

The unitd OTel support is the rust-based software. I was inspired
by the devel/xtensa-esp-elf/Makefile, so create the corresponding
solution.

<ChangeLog>

*) Feature: initial OpenTelemetry (OTEL) support. (Disabled by default).

*) Feature: support for JSON formatted access logs.

*) Bugfix: tweak the Perl language module to avoid breaking scripts in

some circumstances.

</ChangeLog>