Keep Polygon transactions for free

Decentraland has been using [Biconomy](https://www.biconomy.io), a meta-transaction relayer, to provide free transactions in Polygon since the [launch](https://decentraland.org/blog/announcements/introducing-wearables-editor) of the new user-generated collections in Polygon on June 1, 2021.

Biconomy, is changing his business model requiring projects to fund their own "Gas tank" to send meta transactions. Before they were costing all the transactions.

Since June 1, 2021 (~6 months ago) Decentraland has used 4k MATIC. I'm requesting ~15k MATIC to fund the Gas tank to keep transactions free in Polygon for at least ~1 year having into account that the average gas price can increase. _They have increased from 1 to 30 some months ago_