Avoid recursive load of eshell

* lisp/eshell/eshell.el: Provide eshell before requiring esh-mode to
avoid a recursive load when esh-mode requires esh-module (which in
turn requires eshell).  (Bug #34954)
The double loading can be noticed by entries in 'eshell-load-hook' or
forms passed to (with-eval-after-load 'eshell ...).
1 job for master in 48 minutes and 29 seconds (queued for 4 seconds)
Status Job ID Name Coverage
failed #1217


Name Stage Failure
test-all Test
Makefile:313: recipe for target 'check-doit' failed
make[2]: *** [check-doit] Error 1
make[2]: Leaving directory '/builds/emacs/emacs/test'
Makefile:288: recipe for target 'check-expensive' failed
make[1]: *** [check-expensive] Error 2
make[1]: Leaving directory '/builds/emacs/emacs/test'
Makefile:962: recipe for target 'check-expensive' failed
make: *** [check-expensive] Error 2
ERROR: Job failed: exit code 1