Increase context timeout for bandwidth throttled reader

[poornas]

Fixes #12812

Description

Motivation and Context

Current timeout was at 10 minutes, increasing to an hour

How to test this PR?

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Optimization (provides speedup with no functional changes)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• Fixes a regression (If yes, please add commit-id or PR # here)
• Documentation updated
• Unit tests added/updated

[harshavardhana]

Lint failures

golang.org/x/tools/cmd/stringer
Running lint check
internal/bucket/bandwidth/monitor.go:183:1: exported: exported method Monitor.IsThrottled should have comment or be unexported (revive)
func (m *Monitor) IsThrottled(bucket string) bool {
	m.tlock.RLock()
	defer m.tlock.RUnlock()
	_, ok := m.bucketThrottle[bucket]
	return ok
}
make: *** [Makefile:35: lint] Error 1
Error: Process completed with exit code 2.

[vadmeste]

LGTM

[minio-trusted]

Mint Automation

Test	Result
mint-large-bucket.sh	✔️
mint-fs.sh	✔️
mint-gateway-s3.sh	✔️
mint-erasure.sh	✔️
mint-dist-erasure.sh	✔️
mint-zoned.sh	✔️
mint-gateway-nas.sh	✔️
mint-compress-encrypt-dist-erasure.sh	✔️
Deleting image on docker hub
Deleting image locally