build/ci: Update Go to v1.24, golangci-lint to v1.64.6 and fix issues (#1804)

* build/ci: Update Go to v1.24, golangci-lint to v1.64.5 and fix issues

* Address shazbert's nitters

* linter/config: Fix new linter issue and use versionSize const

* Address gk's nitters and fix additional linter issue after rebase

* Address glorious nits

* staticcheck: Fix additional linter issues after upgrading to Go 1.24.1 and golangci-lint v1.64.6

Also addresses nits

* Improve testing, assertify usage and use common.ErrParsingWSField

* TestCreateNewStrategy: Replace must > should wording

backtester/btrpc/btrpc.swagger.json

@@ -138,8 +138,7 @@
             "name": "config.dataSettings.interval",
             "in": "query",
             "required": false,
-            "type": "string",
-            "format": "uint64"
+            "type": "string"
           },
           {
             "name": "config.dataSettings.datatype",
@@ -426,8 +425,7 @@
             "name": "intervalOverride",
             "in": "query",
             "required": false,
-            "type": "string",
-            "format": "uint64"
+            "type": "string"
           }
         ],
         "tags": [
@@ -723,8 +721,7 @@
       "type": "object",
       "properties": {
         "interval": {
-          "type": "string",
-          "format": "uint64"
+          "type": "string"
         },
         "datatype": {
           "type": "string"