Add variable/vector support to range

[rfbgo]

Adds support for dynamic vector generation through range, eg:

    variables:
      foo: [1, 2, 4]
      bar: range(1, {foo})

Also adds pow2_range

(this PR is very test heavy [85%], so is not as crazy as the +900 makes it look)

[ramble-project-pr-bot]

Ramble Performance Test Metrics

Results produced with commit: ad623bf

Test Name	Outcome	Duration (s)	Most Recent Run (s)	Last 5 Avg (s)
test_analyze_large_file	passed	1.0378	1.0761 (893e6bf)	1.0855
test_large_template_expansion	passed	1.1937	1.1868 (893e6bf)	1.1757
test_many_experiments	passed	26.0635	23.4889 (893e6bf)	23.2700
test_many_objects_defaults	passed	13.2382	13.3383 (893e6bf)	12.2945
test_matrix_filter_perf	passed	1.0681	1.0997 (893e6bf)	1.0671

[codecov]

Codecov Report

❌ Patch coverage is 98.41270% with 9 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
lib/ramble/ramble/renderer.py	88.88%	4 Missing ⚠️
...uiltin/base_classes/application-base/base_class.py	93.75%	3 Missing ⚠️
lib/ramble/ramble/expander.py	92.30%	2 Missing ⚠️

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