bloom-builder: panic: mkdir /tmp/bloom-block-1802389595: read-only file system

[diranged]

Describe the bug

If you get past #14082 - a followup issue looks to be that /tmp is not created for the pod either, causing this error:

panic: mkdir /tmp/bloom-block-1802389595: read-only file system

goroutine 425 [running]:
github.com/grafana/loki/v3/pkg/bloombuild/builder.(*Builder).writerReaderFunc(0x4001404201?)
	/src/loki/pkg/bloombuild/builder/builder.go:524 +0xf0
github.com/grafana/loki/v3/pkg/bloombuild/builder.(*LazyBlockBuilderIterator).Next(0x40014281e0)
	/src/loki/pkg/bloombuild/builder/spec.go:224 +0x270
github.com/grafana/loki/v3/pkg/bloombuild/builder.(*Builder).processTask(0x40011fa200, {0x3c79330, 0x4001244450}, 0x4000b7f720)
	/src/loki/pkg/bloombuild/builder/builder.go:405 +0x1418
github.com/grafana/loki/v3/pkg/bloombuild/builder.(*Builder).builderLoop(0x40011fa200, {0x3c93370, 0x40012ca540})
	/src/loki/pkg/bloombuild/builder/builder.go:242 +0x230
github.com/grafana/loki/v3/pkg/bloombuild/builder.(*Builder).connectAndBuild(0x40011fa200, {0x3c79368, 0x400139e2d0})
	/src/loki/pkg/bloombuild/builder/builder.go:201 +0x288
github.com/grafana/loki/v3/pkg/bloombuild/builder.(*Builder).running(0x40011fa200, {0x3c79368, 0x400139e2d0})
	/src/loki/pkg/bloombuild/builder/builder.go:142 +0xd0
github.com/grafana/dskit/services.(*BasicService).main(0x40013b40a0)
	/src/loki/vendor/github.com/grafana/dskit/services/basic_service.go:193 +0x17c
created by github.com/grafana/dskit/services.(*BasicService).StartAsync.func1 in goroutine 80
	/src/loki/vendor/github.com/grafana/dskit/services/basic_service.go:122 +0xfc