fix #20000 by adding injected routines to toInject

[metagn]

fixes #20000

Edit: Did not realize skipping CI for the second commit would stop the CI for the first commit, will force push with some fixes later

[metagn]

Reason for CI failure: Basically, if you inject a routine, but also use a outside routine with the same name in the template, then that outside routine will not be captured at the template definition, and the user will instead need it imported. bind will be bypassed too. So using toInject isn't good enough.

Upon further inspection these lines are the relevant ones:

Nim/compiler/semtempl.nim

Lines 63 to 72 in fb5fbf1

	if i <= 1 and r != scForceOpen:
	# XXX this makes more sense but breaks bootstrapping for now:
	# (s.kind notin routineKinds or s.magic != mNone):
	# for instance 'nextTry' is both in tables.nim and astalgo.nim ...
	if not isField or sfGenSym notin s.flags:
	result = newSymNode(s, info)
	markUsed(c, info, s)
	onUse(info, s)
	else:
	result = n

The XXX part is probably the correct fix but I am afraid to touch it for now.