W+ enum leads to sdk creation problems

[raffis]

Describe the bug

The enum w+ in the openapi/swagger specs lead to problems since clients are generated with stripping the + which leads to double constants (W).

            access:
              description: Access level.
              type: string
              default: rw
              enum:
                - rw
                - w
                - m
                - w+

go get: warning: modules disabled by GO111MODULE=auto in GOPATH/src;

	ignoring go.mod;

	see 'go help modules'

github.com/gyselroth/balloon-sdk-go/models

# github.com/gyselroth/balloon-sdk-go/models

models/core_v2_acl_rule.go:83:2: CoreV2ACLRulePrivilegeW redeclared in this block

	previous declaration at models/core_v2_acl_rule.go:77:35

The same applies to openapi-codegen for the php sdk.

Expected behavior

Rename the enum to "rp" (read plus => read/write owned files, no access to non owned).
Attention: This changes requires a migration since all access rules use "w+" and also requires minimal changes in the access control (rename const).

Environment

• balloon server version: v2.6.5