[Bug] Provisioning a pinecone.Index if the name already exists results in a panic

[jkodroff]

Is this a new bug?

• I believe this is a new bug
• I have searched the existing issues, and I could not find an existing issue for this bug

Current Behavior

pulumi up panics attempting to create an index with a naming collision.

Expected Behavior

The provider should return a meaningful error message, not panic.

Steps To Reproduce

1. Create an index in the PineCone console.
2. Create a pinecone.PineconeIndex with the same name
3. pulumi up will panic (stack trace below)

Relevant log output

Diagnostics:
  pulumi:pulumi:Stack (ratest-dev):
    panic: runtime error: invalid memory address or nil pointer dereference
    [signal SIGSEGV: segmentation violation code=0x2 addr=0x8 pc=0x1056d61b8]
    goroutine 82 [running]:
    github.com/pinecone-io/pulumi-pinecone/provider/pkg/pinecone/index.(*PineconeIndex).Create(_, {_, _}, {_, _}, {{0x1400026eb90, 0xf}, 0x180, {0x1400026eb86, 0x6}, ...}, ...)
        /home/runner/work/pulumi-pinecone/pulumi-pinecone/provider/pkg/pinecone/index/index.go:225 +0xee8
    github.com/pulumi/pulumi-go-provider/infer.(*derivedResourceController[...]).Create(0x105ba9d60?, {0x105b9fae0, 0x140003ec510}, {{0x140002940f0, 0x44}, 0x140003ec1b0, 0x0, 0x0})
        /home/runner/go/pkg/mod/github.com/pulumi/[email protected]/infer/resource.go:907 +0x18c
    github.com/pulumi/pulumi-go-provider/middleware/dispatch.Wrap.func6({0x105b9fae0, 0x140003ec510}, {{0x140002940f0, 0x44}, 0x140003ec1b0, 0x0, 0x0})
        /home/runner/go/pkg/mod/github.com/pulumi/[email protected]/middleware/dispatch/dispatch.go:90 +0x130
    github.com/pulumi/pulumi-go-provider/middleware/context.Wrap.func9({0x105b9fae0?, 0x140003ec480?}, {{0x140002940f0, 0x44}, 0x140003ec1b0, 0x0, 0x0})
        /home/runner/go/pkg/mod/github.com/pulumi/[email protected]/middleware/context/context.go:53 +0x80
    github.com/pulumi/pulumi-go-provider/middleware/cancel.Wrap.func10({0x105b9fae0?, 0x140003ec420?}, {{0x140002940f0, 0x44}, 0x140003ec1b0, 0x0, 0x0})
        /home/runner/go/pkg/mod/github.com/pulumi/[email protected]/middleware/cancel/cancel.go:126 +0xa8
    github.com/pulumi/pulumi-go-provider.(*provider).Create(0x14000216360, {0x105b956c8?, 0x140003ec180}, 0x1400009aaf0)
        /home/runner/go/pkg/mod/github.com/pulumi/[email protected]/provider.go:818 +0x20c
    github.com/pulumi/pulumi/sdk/v3/proto/go._ResourceProvider_Create_Handler.func1({0x105b956c8, 0x140003ec180}, {0x105ad1420?, 0x1400009aaf0})
        /home/runner/go/pkg/mod/github.com/pulumi/pulumi/sdk/[email protected]/proto/go/provider_grpc.pb.go:593 +0x74
    github.com/grpc-ecosystem/grpc-opentracing/go/otgrpc.OpenTracingServerInterceptor.func1({0x105b956c8, 0x140003f4c60}, {0x105ad1420, 0x1400009aaf0}, 0x14000394740, 0x140003c8480)
        /home/runner/go/pkg/mod/github.com/grpc-ecosystem/[email protected]/go/otgrpc/server.go:57 +0x308
    github.com/pulumi/pulumi/sdk/v3/proto/go._ResourceProvider_Create_Handler({0x105b42be0?, 0x14000216360}, {0x105b956c8, 0x140003f4c60}, 0x1400012ea80, 0x1400069bf80)
        /home/runner/go/pkg/mod/github.com/pulumi/pulumi/sdk/[email protected]/proto/go/provider_grpc.pb.go:595 +0x138
    google.golang.org/grpc.(*Server).processUnaryRPC(0x14000259000, {0x105b956c8, 0x140003f4bd0}, {0x105b9fcc0, 0x14000502ea0}, 0x14000238900, 0x14000224de0, 0x106358980, 0x0)
        /home/runner/go/pkg/mod/google.golang.org/[email protected]/server.go:1372 +0xc6c
    google.golang.org/grpc.(*Server).handleStream(0x14000259000, {0x105b9fcc0, 0x14000502ea0}, 0x14000238900)
        /home/runner/go/pkg/mod/google.golang.org/[email protected]/server.go:1783 +0xc9c
    google.golang.org/grpc.(*Server).serveStreams.func2.1()
        /home/runner/go/pkg/mod/google.golang.org/[email protected]/server.go:1016 +0x5c
    created by google.golang.org/grpc.(*Server).serveStreams.func2
        /home/runner/go/pkg/mod/google.golang.org/[email protected]/server.go:1027 +0x148

    error: update failed

  pinecone:index:PineconeIndex (pinecone-index):
    error: error reading from server: EOF

### Environment

```markdown
- **OS**:
- **Language version**:
- **Pinecone client version**:

Additional Context

No response