fix: rollup deployment configuration

[ratankaliani]

If the environment variable is set for the address, return it. Otherwise, return the address associated with the private key. If the private key is not set, return the zero address.

[github-actions]

Metric	Value
Batch Start	21,117,330
Batch End	21,117,335
Witness Generation (seconds)	83
Execution Duration (seconds)	57
Total Instruction Count	1,270,067,376
Oracle Verify Cycles	317,179,668
Derivation Cycles	637,315,706
Block Execution Cycles	202,174,739
Blob Verification Cycles	134,967,639
Total SP1 Gas	1,508,162,473
Number of Blocks	6
Number of Transactions	59
Ethereum Gas Used	19,055,223
Cycles per Block	211,677,896
Cycles per Transaction	21,526,565
Transactions per Block	9
Gas Used per Block	3,175,870
Gas Used per Transaction	322,969
BN Pair Cycles	0
BN Add Cycles	0
BN Mul Cycles	0
KZG Eval Cycles	0
EC Recover Cycles	324,220