feat(middleware_stack): introduce alias #prepend for #unshift, #remov… #1461

Job	Run time
Lint	36s
Test Ruby `2.7` with Gemfile `Gemfile`	3m 4s
Test Ruby `3.0` with Gemfile `Gemfile`	2m 24s
Test Ruby `3.1` with Gemfile `Gemfile`	2m 17s
Test Ruby `3.2` with Gemfile `Gemfile`	2m 26s
Test Ruby `3.3` with Gemfile `Gemfile`	2m 33s
Test Ruby `3.4.0-preview1` with Gemfile `Gemfile`	2m 31s
Test Ruby `jruby-9.4` with Gemfile `Gemfile`	18m 27s
Gather coverage	3s
	34m 21s

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