Support Task Names without Signatures

[0xm3rlin]

Instead of using signatures for task names consider the following:

Add a new parameter here:
https://github.com/gelatodigital/ops/blob/dd0d214bf59376ed771b5da036411f3cf6853081/contracts/Ops.sol#L50

string calldata name

And emit the name here:
https://github.com/gelatodigital/ops/blob/dd0d214bf59376ed771b5da036411f3cf6853081/contracts/Ops.sol#L206

then you can cheaply get all names for tasks, either by quickly querying events or by getting them through a subgraph

[hilmarx]

Thanks for the input @0xm3rlin, noted! Will work on a solution. Problem with this is that you would have to do an onchain tx if you want to change the name which I think is a bit annoying.