Renaming and preparing to remove oracles (#985)

A few references to oracles still remain, but they have been removed as a feature, at least.

Reviewed-on: #985
Reviewed-by: Ulf Wiger <ulfwiger@qpq.swiss>
Co-authored-by: Craig Everett <zxq9@zxq9.com>
Co-committed-by: Craig Everett <zxq9@zxq9.com>

test/contracts/toplevel_constants.aes

@@ -28,8 +28,6 @@ contract C =
     let c16 = #000102030405060708090a0b0c0d0e0f000102030405060708090a0b0c0d0e0f
     let c17 = #000102030405060708090a0b0c0d0e0f000102030405060708090a0b0c0d0e0f000102030405060708090a0b0c0d0e0f000102030405060708090a0b0c0d0e0f
     let c18 = RelativeTTL(50)
-    let c19 = ok_2YNyxd6TRJPNrTcEDCe9ra59SVUdp9FR9qWC5msKZWYD9bP9z5
-    let c20 = oq_2oRvyowJuJnEkxy58Ckkw77XfWJrmRgmGaLzhdqb67SKEL1gPY
     let c21 = ct_Ez6MyeTMm17YnTnDdHTSrzMEBKmy7Uz2sXu347bTDPgVH2ifJ : C
     let c22 = N.nsconst
     let c23 = c01
@@ -54,8 +52,6 @@ contract C =
     entrypoint f16() = c16
     entrypoint f17() = c17
     entrypoint f18() = c18
-    entrypoint f19() = c19
-    entrypoint f20() = c20
     entrypoint f21() = c21
     entrypoint f22() = c22
     entrypoint f23() = c23