Remove the `helper` wrapper from the helper generator #10146

Job	Run time
Linting	1m 7s
Basic Test	1m 31s
Type Checking (current version)	1m 1s
Type Checking (other supported versions) (4.9)	1m 5s
Type Checking (other supported versions) (5.0)	1m 9s
Type Checking (other supported versions) (5.1)	1m 1s
Type Checking (other supported versions) (5.2)	1m 6s
Type Checking (other supported versions) (5.3)	1m 10s
Blueprint Tests	4m 48s
Browserstack Tests (Safari, Edge)	6m 40s
Smoke tests (Full Ember Apps) (classic-basics)	1m 16s
Browser Tests (Firefox)	1m 39s
Smoke tests (Full Ember Apps) (embroider-basics)	1m 15s
Node.js Tests	51s
All deprecations enabled	1m 35s
All deprecations enabled, with optional features	1m 40s
Deprecations as errors	1m 32s
Deprecations as errors, with optional features	1m 34s
Production build	1m 30s
Production build, with optional features	1m 36s
Publish alpha from default branch	0s
Publish channel to s3	0s
Deploy tags to npm	0s
Notify Discord	0s
	35m 6s

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