Kernel.require should not try to load lazy rubygems

[eregon]

Reported by @nirvdrum.
With zeitwerk we can end up in a stack overflow that looks like:

.../truffleruby-dev/gems/zeitwerk-2.6.9/lib/zeitwerk/kernel.rb:38:in `require'
<internal:core> core/unbound_method.rb:18:in `bind_call'
<internal:core> core/kernel.rb:272:in `require'
.../truffleruby-dev/gems/zeitwerk-2.6.9/lib/zeitwerk/kernel.rb:38:in `require'
<internal:core> core/unbound_method.rb:18:in `bind_call'
<internal:core> core/kernel.rb:272:in `require'

So the issue is RubyGems redefines Kernel#require but not Kernel.require. The original Kernel#require is a module_function, so after RubyGems we have: Kernel#require -> RubyGems require; Kernel.require -> the initial core require with lazy-rubygems handling (line 243).
And indeed, on CRuby:

$ ruby -e 'p method(:require)'
#<Method: Object(Kernel)#require(path) <internal:/home/eregon/.rubies/ruby-3.2.2/lib/ruby/3.2.0/rubygems/core_ext/kernel_require.rb>:36>
$ ruby -e 'p Kernel.method(:require)'
#<Method: Kernel.require(_)>

And on TruffleRuby:

jt -q ruby -e 'p Gem; p method(:require); p Kernel.method(:require)'
Gem
#<Method: #<Class:#<Object:0x8>>(Kernel)#require(path) <internal:/home/eregon/code/truffleruby-ws/graal/sdk/mxbuild/linux-amd64/GRAALVM_3555B82685_JAVA21/graalvm-3555b82685-java21-23.1.0-dev/languages/ruby/lib/mri/rubygems/core_ext/kernel_require.rb>:36>
#<Method: Kernel.require(feature) <internal:core> core/kernel.rb:243>

But Kernel.require should be the one without lazy-rubygems behavior, i.e., gem_original_require in core/kernel.rb.