feat: update Fraxtal set to be a Superlane set, update Flow validator…

… set (#4857)

### Description

- Updates the Fraxtal set to include Superlane operators
- Adds the Flow Foundation to flowmainnet

### Drive-by changes

<!--
Are there any minor or drive-by changes also included?
-->

### Related issues

<!--
- Fixes #[issue number here]
-->

### Backward compatibility

<!--
Are these changes backward compatible? Are there any infrastructure
implications, e.g. changes that would prohibit deploying older commits
using this infra tooling?

Yes/No
-->

### Testing

<!--
What kind of testing have these changes undergone?

None/Manual/Unit Tests
-->

.changeset/funny-elephants-pretend.md

@@ -0,0 +1,5 @@
+---
+'@hyperlane-xyz/sdk': minor
+---
+
+Updated Fraxtal set to include Superlane validators, updated Flow set

typescript/sdk/src/consts/multisigIsm.ts

@@ -350,11 +350,12 @@ export const defaultMultisigConfigs: ChainMap<MultisigConfig> = {
   },
 
   flowmainnet: {
-    threshold: 2,
+    threshold: 3,
     validators: [
       '0xe132235c958ca1f3f24d772e5970dd58da4c0f6e',
       '0xcf0211fafbb91fd9d06d7e306b30032dc3a1934f', // merkly
       '0x4f977a59fdc2d9e39f6d780a84d5b4add1495a36', // mitosis
+      '0x14ADB9e3598c395Fe3290f3ba706C3816Aa78F59', // flow foundation
     ],
   },
 
@@ -364,11 +365,14 @@ export const defaultMultisigConfigs: ChainMap<MultisigConfig> = {
   },
 
   fraxtal: {
-    threshold: 2,
+    threshold: 4,
     validators: [
       '0x4bce180dac6da60d0f3a2bdf036ffe9004f944c1',
-      '0xcf0211fafbb91fd9d06d7e306b30032dc3a1934f', // merkly
-      '0x25b3a88f7cfd3c9f7d7e32b295673a16a6ddbd91', // luganodes
+      '0x0d4c1394a255568ec0ecd11795B28D1BdA183Ca4', // tessellated (superlane)
+      '0x1c3C3013B863Cf666499Da1A61949AE396E3Ab82', // enigma (superlane)
+      '0x573e960e07ad74ea2c5f1e3c31b2055994b12797', // imperator (superlane)
+      '0x14d0B24d3a8F3aAD17DB4b62cBcEC12821c98Cb3', // bware (superlane)
+      '0x25b3a88f7cfd3c9f7d7e32b295673a16a6ddbd91', // luganodes (superlane)
     ],
   },