chore(f3): set F3InitialPowerTableCID in calibnet (#12649)

From archioz:
```
> lotus f3 manifest
Manifest:
  Protocol Version:     4
  Paused:               false
  Initial Instance:     0
  Initial Power Table:  bafy2bzaceab236vmmb3n4q4tkvua2n4dphcbzzxerxuey3mot4g3cov5j3r2c
  Bootstrap Epoch:      2081674
  Network Name:         calibrationnet
  Ignore EC Power:      false
  Committee Lookback:   10
  Catch Up Alignment:   15s
```

Signed-off-by: Jakub Sztandera <oss@kubuxu.com>

build/buildconstants/params_calibnet.go

@@ -160,7 +160,7 @@ const F3Enabled = true
 var F3ManifestServerID = MustParseID("12D3KooWS9vD9uwm8u2uPyJV32QBAhKAmPYwmziAgr3Xzk2FU1Mr")
 
 // The initial F3 power table CID.
-var F3InitialPowerTableCID cid.Cid = cid.Undef
+var F3InitialPowerTableCID cid.Cid = cid.MustParse("bafy2bzaceab236vmmb3n4q4tkvua2n4dphcbzzxerxuey3mot4g3cov5j3r2c")
 
 // Calibnet F3 activation epoch is 2024-10-24T13:30:00Z - Epoch 2081674
 const F3BootstrapEpoch abi.ChainEpoch = UpgradeTuktukHeight + 2880