fix: use legacy providers for testnets #1028

Job	Run time
build	7m 3s
next_js_analyze	18s
deploy	35s
cypress_smoke_v2 (polygon)	3m 34s
cypress_smoke_v3 (polygon)	4m 28s
cypress_smoke_v2 (avalanche)	5m 18s
cypress_smoke_v3 (avalanche)	3m 21s
cypress_smoke_v3 (optimism)	4m 17s
cypress_smoke_v3 (ethereum)	7m 37s
cypress_smoke_v3 (base)	3m 44s
cypress_smoke_v3 (gho)	1m 51s
cypress_smoke_v3 (gnosis)	3m 8s
cypress_smoke_v3 (bnb)	3m 44s
cypress_full_v3 (polygon)	3m 35s
cypress_full_v3 (optimism)	3m 1s
cypress_full_v2 (polygon)	2m 19s
cypress_app_functionality (settings)	2m 31s
cypress_full_v3 (ethereum)	10m 42s
cypress_full_v2 (avalanche)	2m 16s
cypress_app_functionality (mobile)	2m 14s
cypress_full_v3 (gho)	1m 58s
cypress_app_functionality (governance-stake)	5m 13s
cypress_full_v3 (base)	2m 45s
cypress_app_functionality (widgets)	2m 56s
cypress_app_functionality (general)	2m 19s
	1h 30m 47s

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