fix(pagination): Fix after for regexp, match functions (#7700)

[all-seeing-code]

Match, Compare, Regexp and Geo functions didn't work with after attribute. The PR fixes that.

With this PR, the following type of queries are possible:

{
	q(func: match(name, Ali, 5), after: 0x2710) {
		uid
		name
	}
}

(cherry picked from commit c11a607)

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✅ anurags92
❌ rohanprasad
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[coveralls]

Coverage decreased (-0.001%) to 37.172% when pulling f2e8981 on cherry-pick-7700 into 2b1441d on main.