step-ca: Re-deploy (again) with DCH CA R2

Although most libraries support ED25519 signatures for X.509
certificates, Firefox does not.  This means that any certificate signed
by DCH CA R3 cannot be verified by the browser and thus will always
present a certificate error.

I want to migrate internal services that do not need certificates
that are trusted by default (i.e. they are only accessed programatically
or only I use them in the browser) back to using an internal CA instead
of the public *pyrocufflink.net* wildcard certificate.  For applications
like Frigate and UniFi Network, these need to be signed by a CA that
the browser will trust, so the ED25519 certificate is inappropriate.
Thus, I've decided to migrate back to DCH CA R2, which uses an EdDSA
signature, and can therefore be trusted by Firefox, etc.

step-ca/intermediate_ca.crt

@@ -1,15 +1,13 @@
 -----BEGIN CERTIFICATE-----
-MIICTzCCAgGgAwIBAgIUDNTFsSYYl8xsEcg9kTatxvOSkmUwBQYDK2VwMEAxCzAJ
-BgNVBAYTAlVTMRgwFgYDVQQKDA9EdXN0aW4gQy4gSGF0Y2gxFzAVBgNVBAMMDkRD
-SCBSb290IENBIFIzMB4XDTI0MDIxNzIwMjk0M1oXDTI1MDIxNzIwMjk0M1owOzEL
-MAkGA1UEBhMCVVMxGDAWBgNVBAoMD0R1c3RpbiBDLiBIYXRjaDESMBAGA1UEAwwJ
-RENIIENBIFIzMCowBQYDK2VwAyEA50stJ8iW6/f+uECPxAJwpSfQDRQg4/AgKJY2
-lpd3uNijggEQMIIBDDAdBgNVHQ4EFgQUtiqtFaZZ/c4IfWXV5SjJIOPbmoowHwYD
-VR0jBBgwFoAUtmjEAcG9apstYyBr8MACUb2J2jkwEgYDVR0TAQH/BAgwBgEB/wIB
-ADALBgNVHQ8EBAMCAYYwHQYDVR0lBBYwFAYIKwYBBQUHAwIGCCsGAQUFBwMBMEwG
-CCsGAQUFBwEBBEAwPjA8BggrBgEFBQcwAoYwaHR0cHM6Ly9kdXN0aW4uaGF0Y2gu
-bmFtZS9kY2gtY2EvZGNoLXJvb3QtY2EuY3J0MDwGA1UdHwQ1MDMwMaAvoC2GK2h0
-dHBzOi8vZHVzdGluLmhhdGNoLm5hbWUvZGNoLWNhL2RjaC1jYS5jcmwwBQYDK2Vw
-A0EAACaKAJAKejpFXQV+mgPdDXaylvakc4rCEs1pFhPXbbMMGflNOeiiy+c+aMwt
-yfObaZ8/YiXxCSjL6/KzRSSjAQ==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 -----END CERTIFICATE-----