chore: add a test that uses ping to check filter subscription

[danisharora099]

This PR adds a test for Filter that depicts how Filter ping should be used to check for active Filter subscriptions with service nodes.

This is in reference to #914 (comment) & waku-org/docs.waku.org#104 (comment)

[github-actions]

size-limit report 📦

Path	Size	Loading time (3g)	Running time (snapdragon)	Total time
Waku core	83.28 KB (0%)	1.7 s (0%)	271 ms (-7.37% 🔽)	2 s
Waku Simple Light Node	263.25 KB (0%)	5.3 s (0%)	575 ms (-10.12% 🔽)	5.9 s
ECIES encryption	79.15 KB (-0.18% 🔽)	1.6 s (-0.18% 🔽)	440 ms (+39.3% 🔺)	2.1 s
Symmetric encryption	79.16 KB (-0.18% 🔽)	1.6 s (-0.18% 🔽)	351 ms (-14.18% 🔽)	2 s
DNS discovery	110.92 KB (0%)	2.3 s (0%)	278 ms (-38.11% 🔽)	2.5 s
Privacy preserving protocols	131.44 KB (-0.09% 🔽)	2.7 s (-0.09% 🔽)	459 ms (-7.13% 🔽)	3.1 s
Light protocols	81.12 KB (0%)	1.7 s (0%)	224 ms (-15.5% 🔽)	1.9 s
History retrieval protocols	80.22 KB (0%)	1.7 s (0%)	231 ms (-4.61% 🔽)	1.9 s
Deterministic Message Hashing	5.65 KB (0%)	113 ms (0%)	49 ms (-35.48% 🔽)	162 ms

[weboko]

cool!