Add pyUSD and GLO dollar to GIVbacks token list

[divine-comedian]

Following up on this suggestion from @GriffGreen
https://forum.giveth.io/t/givbacks-token-list/253/41

Private Zenhub Image

We should add these two to our token list and find a way to set the prices.

We should after that add them to our GIVbacks eligible list - which can be done simply from the admin dashboard/

GLO - https://www.coingecko.com/en/coins/glo-dollar
(this doesn't meet our usual liquidity requirements, Griff says we can fix the price to $1 always)

pyUSD - https://www.coingecko.com/en/coins/paypal-usd

[maryjaf]

I set "is stable coin: true" for DrGIV3 on goerli on stg and the result was expected

I need GLO and pyUSD for test on prod, if possible plz send to this my account @divine-comedian
0xcd192b61a8Dd586A97592555c1f5709e032F2505

[divine-comedian]

GLO Dollar

Here's the address on polygon https://polygonscan.com/address/0x4f604735c1cf31399c6e711d5962b2b3e0225ad3

bought a little on uniswap and sent it to you
https://polygonscan.com/tx/0xea314c4096554dfe043ffaca63c9e08f7ae99c5895f0635a34fc603f7a5b66c5

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pyUSD is only on mainnet so a bit outta my budget for testing :( - I think it's okay though if we don't test on prod, unless @GriffGreen has some to test with

[gglucass]

@divine-comedian @maryjaf wanted to let you know of #1168 - would be cool if this can be updated soon :-)