feat(headless): eval DSL exprs in args #335

Job	Run time
Lint	1m 31s
Tests (ubuntu-latest)	7m 52s
Tests (windows-latest)	11m 36s
Tests (macOS-latest)	6m 11s
Template validate	1m 2s
CodeQL analysis	5m 3s
Functional tests (ubuntu-latest)	5m 37s
Integration tests (ubuntu-latest)	15m 1s
Functional tests (windows-latest)	13m 39s
Release test	12m 56s
Integration tests (windows-latest)	16m 17s
Functional tests (macOS-latest)	5m 33s
Run example SDK	1m 38s
Integration tests (macOS-latest)	14m 10s
Flamegraph	3m 28s
	2h 1m 34s

Provide feedback